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- # Pleroma: A lightweight social networking server
- # Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
- # SPDX-License-Identifier: AGPL-3.0-only
-
- # Code based on CreateChatMessageValidator
- # NOTES
- # - doesn't embed, will only get the object id
- defmodule Pleroma.Web.ActivityPub.ObjectValidators.CreateGenericValidator do
- use Ecto.Schema
-
- alias Pleroma.EctoType.ActivityPub.ObjectValidators
- alias Pleroma.Object
- alias Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes
- alias Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations
-
- import Ecto.Changeset
-
- @primary_key false
-
- embedded_schema do
- field(:id, ObjectValidators.ObjectID, primary_key: true)
- field(:actor, ObjectValidators.ObjectID)
- field(:type, :string)
- field(:to, ObjectValidators.Recipients, default: [])
- field(:cc, ObjectValidators.Recipients, default: [])
- field(:object, ObjectValidators.ObjectID)
- field(:expires_at, ObjectValidators.DateTime)
-
- # Should be moved to object, done for CommonAPI.Utils.make_context
- field(:context, :string)
- end
-
- def cast_data(data, meta \\ []) do
- data = fix(data, meta)
-
- %__MODULE__{}
- |> changeset(data)
- end
-
- def cast_and_apply(data) do
- data
- |> cast_data
- |> apply_action(:insert)
- end
-
- def cast_and_validate(data, meta \\ []) do
- data
- |> cast_data(meta)
- |> validate_data(meta)
- end
-
- def changeset(struct, data) do
- struct
- |> cast(data, __schema__(:fields))
- end
-
- defp fix_context(data, meta) do
- if object = meta[:object_data] do
- Map.put_new(data, "context", object["context"])
- else
- data
- end
- end
-
- defp fix_addressing(data, meta) do
- if object = meta[:object_data] do
- data
- |> Map.put_new("to", object["to"] || [])
- |> Map.put_new("cc", object["cc"] || [])
- else
- data
- end
- end
-
- defp fix(data, meta) do
- data
- |> fix_context(meta)
- |> fix_addressing(meta)
- |> CommonFixes.fix_actor()
- end
-
- defp validate_data(cng, meta) do
- cng
- |> validate_required([:actor, :type, :object])
- |> validate_inclusion(:type, ["Create"])
- |> CommonValidations.validate_actor_presence()
- |> CommonValidations.validate_any_presence([:to, :cc])
- |> validate_actors_match(meta)
- |> validate_context_match(meta)
- |> validate_object_nonexistence()
- |> validate_object_containment()
- end
-
- def validate_object_containment(cng) do
- actor = get_field(cng, :actor)
-
- cng
- |> validate_change(:object, fn :object, object_id ->
- %URI{host: object_id_host} = URI.parse(object_id)
- %URI{host: actor_host} = URI.parse(actor)
-
- if object_id_host == actor_host do
- []
- else
- [{:object, "The host of the object id doesn't match with the host of the actor"}]
- end
- end)
- end
-
- def validate_object_nonexistence(cng) do
- cng
- |> validate_change(:object, fn :object, object_id ->
- if Object.get_cached_by_ap_id(object_id) do
- [{:object, "The object to create already exists"}]
- else
- []
- end
- end)
- end
-
- def validate_actors_match(cng, meta) do
- attributed_to = meta[:object_data]["attributedTo"] || meta[:object_data]["actor"]
-
- cng
- |> validate_change(:actor, fn :actor, actor ->
- if actor == attributed_to do
- []
- else
- [{:actor, "Actor doesn't match with object attributedTo"}]
- end
- end)
- end
-
- def validate_context_match(cng, %{object_data: %{"context" => object_context}}) do
- cng
- |> validate_change(:context, fn :context, context ->
- if context == object_context do
- []
- else
- [{:context, "context field not matching between Create and object (#{object_context})"}]
- end
- end)
- end
-
- def validate_context_match(cng, _), do: cng
- end
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